#include <stdio.h>
float add(float x , float y)
{
    float z;
    z = x + y;
    return (z);
}

int main()
{
    float a,b,c;
    float add(float x , float y);
    printf("Please enter a and b:");
    scanf("%f%f",&a,&b);
    c = add(a, b);
    printf("sum is %f",c);
    return 0;


}